i, barack hussein obama, do solemnly swear. >> i, barack hussein obama, do solemnly swear. >> that i will faithfully execute. >> that i will faithfully execute. >> the office of president of the united states. >> the office of president of the united states. >> and will to the best of my ability. >> and will to the best of my ability. >> preserve, protect, and defend. >> preserve, protect, and defend. >> the constitution of the united states. >> the constitution of the united states. >> so help you god? >> so help me god. >> congratulations, mr. president. >> thank you, mr. chief justice. thank you so much. thank you, sweetie. >> final preparations are going on right now for tomorrow's public swearing-in and the festivities. day kicks off with the president attending church services right here in washington. for more on tomorrow's program and all the tight security around it, let's head over the capitol hill and nbc's ron mott with a good sunday to you, ron. what can we expect for the public inauguration tomorrow? >> hey, there, alex. good day to you. we don't expect this beautiful s